A declaration of document or code type embedded within an HTML, XHTML, XML or SGML document; identifies the version and markup language used. Denoted by the <!DOCTYPE> declaration at the beginning of the document.

fixed-width font

A font in which every character, including the space character, has equal width. In proportional-width fonts, letters such as I and J have less width than M or B.

text-level element

markup element that affects single characters or words.

Unicode

A universal character set designed to support all written languages, as well as scholarly disciplines (e.g., mathematics)

container tag

tags that come in pairs. Container tags use starting and ending tags. For example, when you want emphasis (italic) text, you will contain the text between starting and ending <em> </em> tags. These tags are also called the opening and closing tags.

empty tag

tags that stand alone. Empty tags are those that do not directly format a specified block of text, and therefore one tag can execute the instruction. For example, if you want to create a line break, you insert the <br> tag at the point you want the break

An element

provides the main instruction of the tag. An element is required in every tag. Elements include <body>, <p>, <h1>, <title>, <table> and many others.

An attribute

specifies a quality or describes a certain aspect of the element. For example, a hyperlink is added to a Web page by using the <a>, or anchor, element

a value

gives value to the element and its attribute.

<!DOCTYPE> declaration

the first tag in an HTML document. It informs the interpreter (usually a Web browser) what version of HTML the Web page is written in.

<html> tag

The <html> tag is used as a container for the entire HTML document. It nests all code except for the <!DOCTYPE> declaration.

<head> tag

The head section allows you to insert <meta> tags (which describe the nature of the document), links to style sheets, and the <title> tag.

<meta> tags

The <meta> tag can specify various information about the document, known as metadata. This metadata can include a document description, revision dates, and keywords to help search engines index the page.

<link> tag

The <link> tag references a style sheet and is recommended for HTML5. A style sheet usually has a .css file name extension and a file name similar to the page to which it is linked (e.g., syb.css for the HTML page named syb.html). Style sheets are often p

<title> tag

This tag identifies the document title. Most browsers will display the title in the browse's title bar. The <title> tag is placed within the <head> container tags.

<body> tag

This tag begins the body of the document and includes all the content of the Web page, such as the text, video, hyperlinks and images. The <body> tag is placed after the <head> tag.

Obtain a text editor

Most operating systems have their own editors, so you do not need to download and install one

Install multiple browsers

You will need to test your code in multiple environments.

Set file preferences

the Windows operating systems do not show file name extensions by default